All is working now.
For those folks who are having problems, give this a shot and hopefully it fixes your issue:
1. Per user FISHBONE (thanks for that tip), do a "get info" on your "HD/Library/Preferences" folder and change the "everyone" permission to r+w.
2. Go into the AUDIO MIDI SETUP app, and if the EUPHONIX MIDI device is greyed out, select it and hit DELETE. Then do a reboot.
3. After rebooting, the EUPHONIX MIDI device should be back and no longer greyed out.
4. From here, go into REASON's Preference and select the Auto-Detect Surfaces button on the Control Surfaces tab. All should work now.
Aaron Vezeau
[email protected]